Hmm...that's a tough one. I find inspiration everywhere, I guess. I suppose the way I do these posters is I try to take the movie and break it down into one sentence and then create a design based on that. I try to pretend like I haven't seen the movie or concept art and only have the script to go on (of course, sometimes I break this self-imposed "rule"). I like to keep as far away from the official posters as I can. If I'm just redoing something that already exists, what's the point? And above all--I try to keep it simple and generally only stick to 3 colors (I break this sometimes, too).
Other than that, I'm not real sure. I guess just try to keep things interesting. I don't know, really. I don't have any formal training in this so I don't know what advice to pass along.
thanks for that! and another question if you dont mind.... did you use photoshop or any soft where like that? thanks you so much for telling all those things because right now i need insparation and i think i just found it!